<!doctype html>
<html lang="en">
  <head>
    <meta charset="utf-8">
    <meta name="viewport" content="width=device-width, initial-scale=1">
    <title>Bootstrap demo</title>
    <link href="./assets/bootstrap-5.3.0-alpha1/css/bootstrap.min.css" rel="stylesheet" crossorigin="anonymous">
  </head>
  <body>
    <h1>加法交换律学习</h1>
    <div id="form"></div>
    <div id="questions"></div>
    <script src="./assets/bootstrap-5.3.0-alpha1/js/bootstrap.bundle.min.js" crossorigin="anonymous"></script>
    <script src="./assets/lesson/add-change.js"></script>
  </body>
</html>